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*To*: Guy.Steele at CMU-10A*Subject*: Re: Quotation concerning rational arithmetic*From*: George J. Carrette <GJC at MIT-MC>*Date*: Wed ,7 Jan 81 23:00:00 EDT*Cc*: LISP-FORUM at MIT-MC

Stoutemeyer left out two very important classes of arithmetic which was taught in elementary school (I go back to the old days when the new-math was the "in thing", would have been great if the teachers understood it of course), these are: (1) integer arithmetic modulo N. (2) Boolean arithmetic, including those "sets" and "ven diagrams" with apples and peaches. (Finite sets of course). With "clock arithmetic" as they called it, you can have a nice consistency in the language specification along with a naturalness and closeness to "hardware".

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